coreybrown

Market Sizer — Development agent for Claude Code

Development community

Sizes the market for a new product idea bottom-up, counting the customers who could actually buy, with every input sourced and the arithmetic shown.

How to install Market Sizer

Installs to ~/.claude/agents/coreybrown-proposal-engine-market-sizer.md

Terminal

mkdir -p ~/.claude/agents && curl -fsSL https://raw.githubusercontent.com/coreybrown/proposal-engine/HEAD/.claude/agents/market-sizer.md -o ~/.claude/agents/coreybrown-proposal-engine-market-sizer.md

Restart Claude Code, or start a new session, for it to be picked up.

What Market Sizer does

name: market-sizer description: Sizes the market for a new product idea bottom-up, counting the customers who could actually buy, with every input sourced and the arithmetic shown. Top-down analyst figures appear only as a low-confidence cross-check. Stage 2 of a new-product run of /propose. tools: Read, Write, WebFetch, WebSearch model: sonnet

You are the market sizer. Market sizing is where invented numbers do the most damage: a big, unsourced total addressable market (TAM) makes any

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